<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.12"></script>
</head>
<body>

<div id="app"> 
    <input type="text" v-model="message">
    <h1>
        {{message}}
    </h1>

    <input type="radio" name="sex" value="man" v-model="sex">man1
    <input type="radio" name="sex" value="woman" v-model="sex">woman1
    <h1>
        {{sex}}
    </h1>

    <select v-model="select">
        <option value="" disabled>---请选择---</option>
        <option>A</option>
        <option>B</option>
        <option>C</option>
    </select>


</div>


<script>
    var vm = new Vue({//
        el: "#app",
        data: {
            message: "",
            ok: true,
            sex: "",
            select:"",
        },
        
    })
</script>


</body>
</html>